A photographer claims that Bill Murray slammed him against a door, threatened to “do bodily harm” to him, and then poured a glass of water over his lap — all because Murray thought the snapper was taking his picture.

But restaurant staff later told cops that it was the fotog who was in the wrong, not Murray.

“[Murray] probably thought I was shooting pictures of him, but I had no idea it was him,” said Simon, the 71-year-old brother of singer Carly Simon. “He comes up to me from behind — I’m looking down at my camera to make sure I got a good shot of [the band].”

Simon maintains the “Groundhog Day” star was not in any of his images.

“He grabbed me from behind and pushed me against the exit door and says, ‘I should f - - king throw you out of this place and do you bodily harm,’ and he said it very menacingly,” said Simon, who has shot Bob Marley, Bob Dylan and Led Zeppelin, among others. “I didn’t recognize him. He looks much different than he did in his prime,” he told us.

However, the Boston Globe quoted a police report saying that the restaurant’s owner, Katherine Domitrovich, said Simon had “no business photographing anyone in the restaurant, and was generally annoying.” (Simon denied that to the Globe.)

Simon said he told Murray that he didn’t want to “escalate” the situation because “we’re both grown men,” and offered a truce.

He said that he sat down at an empty seat at a table for about five minutes, but then Murray came back again. “He elbowed me out of that spot, takes a drink and pours it all over me.” Simon believes Murray aimed for his lap, to “try to ruin” his camera.